The energy of a tower is directed upward and out. Wherever they are placed they emit a very focused and directional energy that affects the area around it as well as any other crystals that are nearby.
Tourmaline helps to create a shield around a person or room to prevent negative or unwelcome energies from entering. It is also grounding and helpful to balancing all of the chakras. The stone can even dissolve challenging energy and negative thought patterns, transmuting them into more beneficial energy and beliefs.